Question

Why is plasma membrane called selectively permeable membrane? How do substances like

carbon dioxide and water move in and out of cell?​

Answer 1

Answer:

Since it allows only selected material to pass through it that is why it's called selectively permeable membrane. Substance like water move in and out through by the process of osmosis while gases like CO2 moves in MD out by process called Diffusion.

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Answer 2

Answer:

The substances like CO2 and water move in and out of a cell by diffusion from the region of high concentration to low concentration. When the concentration of CO2 and water is higher in external environment than that inside the cell, CO2 and water moves inside the cell. When the concentration outside the cell becomes low and it is high inside the cell, they moves out.

Explanation:

The cell membrane or plasma membrane is a biological membrane that separates the interior of the cell from the outside environment. The plasma membrane is called as selectively permeable membrane because it regulates the movement of substances in and out of the cell. It means that the plasma membrane allows some material to pass through it while at the same time it blocks other material from entering through it.